Messages in this thread Patch in this message | | | From | Arnaldo Carvalho de Melo <> | Subject | [PATCH 09/29] perf record: Move perf_mmap__write_tail to perf.h | Date | Tue, 25 Jan 2011 15:21:32 -0200 |
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From: Arnaldo Carvalho de Melo <acme@redhat.com>
Close to perf_mmap__read_head() and the perf_mmap struct definition. This is useful for any recorder, and we will need it in 'perf test'.
Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/perf/builtin-record.c | 13 +------------ tools/perf/perf.h | 12 ++++++++++++ 2 files changed, 13 insertions(+), 12 deletions(-)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index d89e2f1..109f3b2 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -80,17 +80,6 @@ static const char *cpu_list; static struct perf_mmap mmap_array[MAX_NR_CPUS]; -static void mmap_write_tail(struct perf_mmap *md, unsigned long tail) -{ - struct perf_event_mmap_page *pc = md->base; - - /* - * ensure all reads are done before we write the tail out. - */ - /* mb(); */ - pc->data_tail = tail; -} - static void advance_output(size_t size) { bytes_written += size; @@ -165,7 +154,7 @@ static void mmap_read(struct perf_mmap *md) write_output(buf, size); md->prev = old; - mmap_write_tail(md, old); + perf_mmap__write_tail(md, old); } static volatile int done = 0; diff --git a/tools/perf/perf.h b/tools/perf/perf.h index 5fb5e1f..a5fc660 100644 --- a/tools/perf/perf.h +++ b/tools/perf/perf.h @@ -108,6 +108,18 @@ static inline unsigned int perf_mmap__read_head(struct perf_mmap *mm) return head; } +static inline void perf_mmap__write_tail(struct perf_mmap *md, + unsigned long tail) +{ + struct perf_event_mmap_page *pc = md->base; + + /* + * ensure all reads are done before we write the tail out. + */ + /* mb(); */ + pc->data_tail = tail; +} + /* * prctl(PR_TASK_PERF_EVENTS_DISABLE) will (cheaply) disable all * counters in the current task. -- 1.6.2.5
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